Glass structure.



G. A.. MYGTT.

'GLASS STRUCUR. i

Awucuiow. msu suv! 22. agar.

11571953, Patented oef; 2G, 1915.

/N VEA/TOR.

surface X-X will vary so that the curve each side produces 'a curve which differs from that of Fig. 4., but sections of which are still symmetrical. i

In Fig. (3 the sections of the curve are ratio of four to th ree between the number of prisms on -each 'sidevof the inclosure prod uces a distribution of still another character upon the surface X-X. Y v

It willbe apparent from thedraiving that high and low lighta reas are produced where radial corrugations on one side are opposite to parallel radial corrugations on the opposite side. It will be found that when ribs of equal wi'dth arcplaced directly opposite each other no bands of high and lowlight areas are observed. As the eye passes over such a surface the variations inthe 4intensity of the light are symmetrical, being exactly the saine for the extent of each prism and, therefo'refno movable or changeable effectis observed. Y

By the term inclosure I intend to differentiate from flat bodies and to indicate bodies having walls extending more or less in the general idirection of an axis, so that prisms may be formed upon l saidVV 'walls of the curve are which can be said to have a longitudinal extension.

I claim:

1. Glass inelosures having a Series of ad'- jacent longitudinal ribs upon one side and upon the other side also'a seriesof adjacent longitudinal ribs substantially parallel thereto, the ribs on the one side being offset with respect to those directly opposite them on the other side.

2. Glass inclosures having a Series of adjacent longitudinal ,prisms upo'n one side and upon the other side a. series of adjacent longitudinal ribs substantially parallel thereto, the prisms on the one side being oitset with respect tothe ribs on thev opposite side.

Glass inclosures having a series of adv I OTIS A. MYGATT. Witnesses:

E. P. RAY, WM, J. CAY.

inclosur'es having a seriesofadlongitudinal prisms substantially parallel i thereto, the prisms on the .one side being off- Y set with respect to those on the opposite side. 

